@shopify/polaris-tokens/dist/typography.json

Design Tokens for the Polaris Design System

{
  "font-stack-base":
    "-apple-system, 'BlinkMacSystemFont', 'San Francisco', 'Roboto', 'Segoe UI', 'Helvetica Neue', sans-serif",
  "font-stack-monospace": "Monaco, Consolas, 'Lucida Console', monospace"
}